Are Presidential Ratings Are Flawed?

Last month 170 presidential scholars were asked to rate all the Presidents.
The results placed Trump at the bottom of the list.
Trump scored 12.3 % out of 100%.
There’s an argument that it’s not valid to judge Trump after just one year in office.
Presidencies change, and unexpected events can alter their courses dramatically.
We also don’t know what the lasting impact of Trump’s words and actions will be.